As far as k-dramas go this is an incredibly fun watch! The character development of the main characters was well done too. I couldn't stop watching!
My only criticism was the side character Hye Ji. There was a lot of potential for that character, particularly because the actress was good and she was to end up with one of the main characters. But her entire personality was that she liked Hyun-min and that she can sew; nothing else. Literally just that, I couldn't relate to her character at all.